Results 11 to 20 of about 133,565 (298)

Cracking Characteristics and Mechanism of Internal Components of Large-Span Shield Tunnel

open access: yesAdvances in Civil Engineering, 2023
With the ever-increasing number of large-span shield tunneling projects and the extended operational time, their distinctive internal component issues are becoming more pronounced and exhibiting unique characteristics.
Fei Dong   +4 more
doaj   +1 more source

Mixed mode II and III fatigue crack growth in a rail steel [PDF]

open access: yesInternational Journal of Fatigue, 2018
Rolling contact fatigue cracks in rails undergo non-proportional mixed-mode I+II+III, in variable proportions along their front. In order to determine the crack growth thresholds and kinetics in mixed-mode II/III, asymmetric four point bending tests are run on a rail steel with different angles between the crack front and the shearing load, so as to
Bonniot, Thomas   +2 more
openaire   +2 more sources

Calibration Procedures for a Computational Model of Ductile Fracture [PDF]

open access: yes, 2010
A recent extension of the Gurson constitutive model of damage and failure of ductile structural alloys accounts for localization and crack formation under shearing as well as tension.
Hutchinson, John W.   +3 more
core   +1 more source

Fatigue Crack Growth under Non-Proportional Mixed Mode Loading in Rail and Wheel Steel Part 2: Sequential Mode I and Mode III Loading

open access: yesApplied Sciences, 2019
Rolling contact fatigue cracks in rail and wheel undergo non-proportional mixed mode I/II/III loading. Fatigue tests were performed to determine the coplanar and branch crack growth rates on these materials.
Makoto Akama, Akira Kiuchi
doaj   +1 more source

Interior defect-induced crack initiation mechanism and initial growth behavior for Ti6Al4V alloy fabricated using laser powder bed fusion

open access: yesJournal of Materials Research and Technology, 2022
The interior defect-induced crack initiation mechanism and early growth behavior of Ti6Al4V alloy fabricated by laser powder bed fusion (LPBF) has been investigated in very high cycle fatigue (VHCF) regime.
Fulin Liu   +5 more
doaj   +1 more source

Fatigue crack growth under mixed-mode I + II and I + III in heat treated 42CrMo4 steel [PDF]

open access: yesInternational Journal of Fracture, 2021
AbstractThe paper contains the results of an experimental investigation of fatigue crack development under mixed-mode I + II and I + III in heat-treated 42CrMo4 steel. Tests were performed on heat-treated compact tension shear specimens and rectangular cross-section specimens for mixed-mode I + III. Mixed-mode I + II tests were conducted for 30 and 60°
Monika Duda   +5 more
openaire   +1 more source

Low velocity impact modeling in composite laminates capturing permanent indentation [PDF]

open access: yes, 2012
This paper deals with impact damage and permanent indentation modeling. A numerical model has been elaborated in order to simulate the different impact damage types developing during low velocity/low energy impact.
Barrau, Jean-Jacques   +2 more
core   +4 more sources

A Review of the Erosion of Thermal Barrier Coatings. [PDF]

open access: yes, 2007
The application of thermal barrier coatings (TBCs) to components with internal cooling in the hot gas stream of gas turbine engines has facilitated a steep increase in the turbine entry temperature and the associated increase in performance and ...
Nicholls, John R., Wellman, R. G.
core   +1 more source

Solar Cell Cracks and Finger Failure Detection Using Statistical Parameters of Electroluminescence Images and Machine Learning

open access: yesApplied Sciences, 2020
A wide range of defects, failures, and degradation can develop at different stages in the lifetime of photovoltaic modules. To accurately assess their effect on the module performance, these failures need to be quantified.
Harsh Rajesh Parikh   +9 more
doaj   +1 more source

Study of high-speed-impact-induced conoidal fracture of Ti alloy layer in composite armor plate composed of Ti- and Al-alloy layers

open access: yesDefence Technology, 2021
In order to understand the mechanism of conoidal fracture damage caused by a high-speed fragment-simulating projectile in titanium alloy layer of a composite armor plate composed of titanium- and aluminum-alloy layers, the ballistic interaction process ...
Peng-ru Li   +3 more
doaj   +1 more source

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